scsi: mpt3sas: Diag-Reset when Doorbell-In-Use bit is set during driver load time

Issue a Diag-Reset when the "Doorbell-In-Use" bit is set during the
driver load/initialization.

Signed-off-by: Ranjan Kumar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Martin K. Petersen <[email protected]>

Author: Ranjan Kumar

drivers/scsi/mpt3sas/mpt3sas_base.c

@@ -7041,11 +7041,12 @@ _base_handshake_req_reply_wait(struct MPT3SAS_ADAPTER *ioc, int request_bytes,
 	int i;
 	u8 failed;
 	__le32 *mfp;
+	int ret_val;
 
 	/* make sure doorbell is not in use */
 	if ((ioc->base_readl_ext_retry(&ioc->chip->Doorbell) & MPI2_DOORBELL_USED)) {
 		ioc_err(ioc, "doorbell is in use (line=%d)\n", __LINE__);
-		return -EFAULT;
+		goto doorbell_diag_reset;
 	}
 
 	/* clear pending doorbell interrupts from previous state changes */
@@ -7135,6 +7136,10 @@ _base_handshake_req_reply_wait(struct MPT3SAS_ADAPTER *ioc, int request_bytes,
 			    le32_to_cpu(mfp[i]));
 	}
 	return 0;
+
+doorbell_diag_reset:
+	ret_val = _base_diag_reset(ioc);
+	return ret_val;
 }
 
 /**